下面是kotlin中简单的完整解决方案。

整个布局就是你的搜索栏

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="35dp"
        android:layout_margin="10dp"
        android:background="@drawable/your_desired_drawable">

        <EditText
            android:id="@+id/search_et"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_alignParentStart="true"
            android:layout_toStartOf="@id/clear_btn"
            android:background="@null"
            android:hint="search..."
            android:imeOptions="actionSearch"
            android:inputType="text"
            android:maxLines="1"
            android:paddingStart="15dp"
            android:paddingEnd="10dp" />

        <ImageView
            android:id="@+id/clear_btn"
            android:layout_width="20dp"
            android:layout_height="match_parent"
            android:layout_alignParentEnd="true"
            android:layout_centerInParent="true"
            android:layout_marginEnd="15dp"
            android:visibility="gone"
            android:src="@drawable/ic_baseline_clear_24"/>

    </RelativeLayout>

现在这是清除按钮的功能，粘贴这段代码在onCreate方法。

search_et.addTextChangedListener(object: TextWatcher {
            override fun beforeTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {
            }
            override fun onTextChanged(s:CharSequence, start:Int, before:Int, count:Int) {
            }
            override fun afterTextChanged(s: Editable) {
                if (s.isNotEmpty()){
                    clear_btn.visibility = VISIBLE
                    clear_btn.setOnClickListener {
                        search_et.text.clear()
                    }
                }else{
                    clear_btn.visibility = GONE
                }
            }
        })

Android材质设计组件2020解决方案:

添加材质组件到你的gradle设置:

从这里查找最新版本:https://maven.google.com/

implementation 'com.google.android.material:material:1.3.0'

或者如果你还没有更新到使用AndroidX库，你可以这样添加:

implementation 'com.android.support:design:28.0.0'

Then

<com.google.android.material.textfield.TextInputLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="@string/hint_text"
    app:endIconMode="clear_text">

  <com.google.android.material.textfield.TextInputEditText
      android:layout_width="match_parent"
      android:layout_height="wrap_content"/>

</com.google.android.material.textfield.TextInputLayout>

注意:app:endIconMode="clear_text"

正如这里所讨论的材料设计文档

这是一个kotlin溶液。把这个助手方法放在某个kotlin文件中

fun EditText.setupClearButtonWithAction() {

    addTextChangedListener(object : TextWatcher {
        override fun afterTextChanged(editable: Editable?) {
            val clearIcon = if (editable?.isNotEmpty() == true) R.drawable.ic_clear else 0
            setCompoundDrawablesWithIntrinsicBounds(0, 0, clearIcon, 0)
        }

        override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) = Unit
        override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) = Unit
    })

    setOnTouchListener(View.OnTouchListener { _, event ->
        if (event.action == MotionEvent.ACTION_UP) {
            if (event.rawX >= (this.right - this.compoundPaddingRight)) {
                this.setText("")
                return@OnTouchListener true
            }
        }
        return@OnTouchListener false
    })
}

然后像下面那样在onCreate方法中使用它，你应该很好

yourEditText.setupClearButtonWithAction()

顺便说一句，你必须添加R.drawable。Ic_clear或清除图标。这个来自谷歌- https://fonts.google.com/icons?selected=Material%20Icons%20Outlined%3Aclear%3A

在你的EditText中添加drawableEnd这样的十字:

<EditText
     ...
    android:drawableEnd="@drawable/ic_close"
    android:drawablePadding="8dp"
     ... />

并使用扩展处理点击(或使用OnTouchListener直接在您的EditText):

fun EditText.onDrawableEndClick(action: () -> Unit) {
    setOnTouchListener { v, event ->
        if (event.action == MotionEvent.ACTION_UP) {
            v as EditText
            val end = if (v.resources.configuration.layoutDirection == View.LAYOUT_DIRECTION_RTL)
                v.left else v.right
            if (event.rawX >= (end - v.compoundPaddingEnd)) {
                action.invoke()
                return@setOnTouchListener true
            }
        }
        return@setOnTouchListener false
    }
}

扩展用法:

editText.onDrawableEndClick {
    // TODO clear action
    etSearch.setText("")
}

您可以使用这个代码片段和Jaydip回答多个按钮。在获得ET和按钮元素的引用后调用它。我使用了vececotr button，所以你必须将button元素更改为ImageButton:

private void setRemovableET(final EditText et, final ImageButton resetIB) {

        et.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (hasFocus && et.getText().toString().length() > 0)
                    resetIB.setVisibility(View.VISIBLE);
                else
                    resetIB.setVisibility(View.INVISIBLE);
            }
        });

        resetIB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                et.setText("");
                resetIB.setVisibility(View.INVISIBLE);
            }
        });

        et.addTextChangedListener(new TextWatcher() {
            @Override
            public void afterTextChanged(Editable s) {}
            @Override
            public void beforeTextChanged(CharSequence s, int start,
                                          int count, int after) {
            }
            @Override
            public void onTextChanged(CharSequence s, int start,
                                      int before, int count) {
                if(s.length() != 0){
                    resetIB.setVisibility(View.VISIBLE);
                }else{
                    resetIB.setVisibility(View.INVISIBLE);
                }
            }
        });
    }

下面是带有小部件的完整库: https://github.com/opprime/EditTextField

要使用它，你应该添加依赖:

compile 'com.optimus:editTextField:0.2.0'

在layout.xml文件中，你可以设置小部件:

xmlns:app="http://schemas.android.com/apk/res-auto"

app:clearButtonMode,can有这样的值: 从来没有 总是 whileEditing unlessEditing 应用:clearButtonDrawable

实际例子: